Mineral Based Human Made Alloy

Stainless Steel Spoon

Iron-Chromium Alloy (Fe + Cr + Ni)

Not a geological specimen

N/A (man-made object)

Unidentified gray metallic object

Not determinable from the image; likely a metal screw or manufactured fastener rather than geological material

Likely gold-colored metal ring with a possible gemstone

Uncertain; possibly gold alloy (Au) with a small quartz or glass-like setting

Rose Gold (Copper-Gold Alloy)

Aurum-Cuprum Alloy (Au-Cu)

Likely blue glass or synthetic gemstone jewelry

Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass

Sea Glass

Man-made vitreous material (silica-based glass)

Chert Arrowhead

Cryptocrystalline Quartz (SiO2)

Metal Alloy (Likely Pewter or Sterling Silver)

Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).

Concrete fragment or Conglomerate

Artificial Conglomerate (Concrete) or Natural Conglomerate

Titanium-coated Metal Cube (Man-made Fidget Toy)

Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)

Concrete rubble

Anthropogenic conglomerate

Native Silver

Silver (Ag)

One Pound Coin (UK)

Nickel-Brass Alloy (Cu-Zn-Ni)

Metal Alloy (Jewelry)

Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.

Blue opalite (often sold as synthetic opal)

Opalite glass; amorphous hydrated silica if natural opal (SiO₂·nH₂O)

Engineered Quartz Stone

Agglomerated Quartz (SiO2 + Polymer Resin)

Note: Item is not a geological specimen

Homo sapiens (Dermal Appendage: Pilus)

Engineered Quartz (Quartzite look-alike)

Silicon Dioxide (SiO2) composite

Faceted glass-like gemstone object

Likely synthetic glass or cubic zirconia; exact material cannot be confirmed from the image

Red gemstone ring, likely garnet or synthetic ruby

Possibly almandine garnet (Fe₃Al₂(SiO₄)₃) or corundum/ruby (Al₂O₃); image alone cannot distinguish

Ornamental ring with likely blue sapphire and diamonds

Blue corundum (sapphire), Al₂O₃; surrounding stones appear diamond, C, set in gold-colored metal

Industrial Slag

Anthropogenic Vitreous Slag

Man-made Metal Pin (Non-geological)

Antimony-Lead Alloy or Zinc/Brass Base with Electroplating

Bismuth crystal

Bismuth (Bi), synthetic laboratory-grown crystal

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Red Painted Rock

Artificial Coated Lithic Fragment

Stainless Steel (Polished)

Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)

Asphalt Concrete

Bituminous Concrete

Inlaid stone ring (likely jasper or agate)

Likely microcrystalline quartz (chalcedony, SiO₂), possibly jasper, with decorative mineral inlays

N/A - Man-made object (Jewelry Chain)

Antiqued or Oxidized Metal Chain (often Steel or Brass)

Carved Mottled Greenish-Yellow Crystal/Glass Object

Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.

Aura Quartz (Anomalously Coated Quartz)

Silicon Dioxide (SiO2) treated with vaporized metals

Painted Sandstone

Sandstone (clastic sedimentary rock) with acrylic/artistic coating

Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)

Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy

Asphalt Concrete (Bituminous Conglomerate)

Anthropogenic Bituminous Conglomerate

Weathered concrete or cementitious slab (not natural rock)

Artificial calcium-silicate cement composite; likely Portland cement concrete

Sandstone

Arenite (SiO2 based)

Kidney Stone

Calcium oxalate, uric acid, struvite, or cystine

Crushed Stone / Gravel

Aggregatus saxum (variable mineral composition)

Native American Pottery Sherd

Man-made Blank Ammunition (Brass)

CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)